Wrench for cylinder-teeth.



no. 731,886. PATENTED JUNE 23, 1903 w. H. GEORGE.

' WRENCH FOR UYLINDER TEETH.

APPLIOATIOK FILED OUT. 11, 1902. y no MODEL.

Nerenese.

Patented June 23,. 1903.

FFICt PATENT WILLIAM H. GEORGE,

on DEXTER, IOWA.

WRENCH FOR CYLINDER-TEETH.

SPECIFICATION forming part of Letters Patent N 0. 731,886, dated June23, 1903.

Application filedOctober 11,1902.

.T at whom it may concern:

Be it known that I, WILLIAM H. GEORGE, a citizen of theUnitedStates,residing at Dexter, in the county of Dallas and State ofIowa,haveinvented certain. new and useful Improvemenls in Wrenches forCylinder-Teeth, of which the following is a specification.

The objects of my invention are toprovide a wrench especially adaptedfor use in adjusting the nuts on the teeth of threshingmachine cylindersor concaves and to provide 1 a wrench of this classof simple, durable,and inexpensive construction and which is ready for instant use eitheroncylinder or concave teeth. i v

, A further object is to provide improved means of simple, durable, andinexpensive construction for limiting the movement of the nut-holderportion relative to the handle in such a manner that the nut-holder maymovefreely in the handle in one direction and be firmly held againstmovement in the opposite direction, and, further, to provide simple andeasily-operated means whereby the movement of the nut-holder relative tothe handle may be reversed, so that aratchet device is provided capableof working in either direction, to the. end that the nutholder when inengagement with the nut may be continuously rotated in either direction,as required, to screw or unscrew the nut by a continuous oscillation ofthe wrench-handle through a segment of a circle.

My invention consists in certain details in the construction,arrangement, and combination of the various parts of the device, wherebythe objects contemplated are attained, as hereinafter morefully setforth, pointed out in. my claim, and illustrated in the accompanyingdrawings, in which- Figure 1 shows a side elevation of the completewrench, the nut-holder portion and part of the handle being shown insection, taken on the indicatedline l f Fig. 2, and a portion of thecross-head of the handle being broken away. Fig. 2 shows an endelevation of the device with the outer nut-holder portion removed. Fig.3 shows the transverse sectional view through the indicated line 3 3ofFig. 1. Fig. 1 shows a rear edge View of the wrench with thehandlebroken away,

Serial No. 126,948. (No model.)

and Fig. 5 shows a detail side view of one of the spring-actuated pawls.

Referring to the accompanying drawings, I have used thereference-numeral ll) to indicate the cross-head of the handle. Thehandle proper is indicated by the numeral 11 and is provided with alaterally-extending portion 12 near the cross-head. At the opposite endof the handle is a part 13, extending at right angles to the handle andhaving a large circular opening through its outer end in line with thecenter of the cross-head l 0. Communicating with this central openingare two parallel recesses 14 and 15, and communicating with theserecesses are round openings 16 and 17, extending to the other end of thepart 13.

Slidingly mounted in each of the recesses 14 and is apawl18,havingastraightouter edge slightly beveled, as clearly shown in, Fig. 2.In the top of the pawl 18 is an extension 19, having a pin 20 at itstop, and beneath the extension 19 is a round arm 21 to pass through theopenings 16 or 17. Mounted upon this arm 21 is an extensile coil-spring22, one end of which is designed to bear against the part 13 at theinner end of one of the recesses 14 or 15, and the other end of thespring is designed to bear against the pawl 18, thus normally forcingsaid pawl by yielding pressuretoward the round opening in the part 13.

I have provided simple and easily-operated means whereby either of thepawls 18 may be held against the pressure of spring 22, so that theywill not project into the opening in the part 13, as follows: Pivoted tothe body portion 13 adjacent to the recesses 14 and 15 is a latch 23,substantially T-shaped in outline, and this latch is so shaped andarranged that it may be placed in engagement with either one of the pins20, and when thus placed will hold the pawl 18 outof the opening in thepart 13, the other pawl being left free to enter said opening whenforced there-' into by its spring.

The nut-holder portion comprises a cylindrical part 24, having anangular nut -receiving opening 25 at one end and a tubular extension 26at its other end long enough to pass through and beyond the opening inthe part 13, said tubular extension 26 being of considerable lessdiameter than the part 24, so that it may readily pass through theopening in the part 13 and so that a shoulder is formed between theparts 26 and 24 to engage one face of the part 13. Formed on the part 26within the opening in the part 13 is a series of teeth 27, extendinglongitudinally of the nut-holder portion and so arranged and shaped asto be engaged by the pawls 18. The outer nut portion is indicated by thereference-numeral 28. Its outer surface is cylindrical and of the samediameter as the part 24:. At the inner end portion of its interior is acylindrical opening to receive the end of the part 26, to which it isfixed by means of a pin 29, and a nut-opening 30 is formed at its outerend. The said part 26 is also provided with a central longitudinalopening 31, into which the screwthreaded portion of thethreshing-machine teeth may'enter when the nuts on said teeth are beingturned by the wrench.

- In practical use it is obvious that my improved wrench-may beconstructed at a minimum of expense. The entire handle portion, with itsopenings and recesses, may be cast complete in one piece, after whichthe crosshead maybe attached and the pawls and the nut-holder portionsplaced in position. In use and assuming that it is desired to use thedevice on the nuts of athreshing cylindrical tube the nut-holder portionis inserted between the bars of a threshing-cylinder and the nut-opening25 placed in engagement with a nut. Then the handle 10 is oscillatedthrough the segment of a circle and the not will be turned with thehandle in one direction, because one of' the pawls 18 will be helddirectly against one of the teeth 27, thus firmly locking the nutholderportion and the handle together. However, upon the reverse movement ofthe cross'head the teeth 27 will strike upon the inclined face of thepawl and press the pawl outwardly against the springpressure, so thatthe nut-holder portion may rotate freely in this direction relative tothe handle.

this connection it is important to note that there must be as littlefriction as'possible between the teeth on the nut-holder portion and thepawls; otherwise the nut-holder portion would not readily and easilyturn within the handle portion, and by providing two independent pawlsof the kind shown having independent springs said springs may bearranged to press the pawl very lightly against the teeth 27 and yieldreadily when said teeth turn relative to the handle portion. If it isdesired to rotate'the nutholder portion in the opposite direction, it isonly necessary to turn the latch 23, so as to engage the pin 20 of theopposite pawl,whereupon the nut-holder portion will be locked in onedirection and be free to rotate in the other direction, thus allowingthe handle portion to move relative to the nut-holder portion in adirection opposite from that which would be permitted if the other pawlwere in engagement with the teeth 27. Obviously the wrench may be usedon the teeth of a threshingmachine concave by placing the nutholderportion 28 in engagement with said nut, the operation of the pawl beingthe same as just previously described. The arms 21 of the pawl 18 serveas guides to hold the pawl in position and to prevent movement of saidpawl in any direction except in a straight line.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States therefor, is

An improved wrench, comprising in combination, a handle portion, anut-holder portion rotatably mounted in the handle portion and having anut-opening at each end and teeth on its periphery of its centralportion, two independent pawls slidingly mounted in the recesses in thehandle portion to engage the toothed portion, a guide-armon each pawl,an extensile coil-spring on each guidearm, forcing the pawl toward thetoothed portion, a pin projecting from each pawl and asubstantially-T-shapedlatch pivoted to the han= dle portion between thepawls and susceptible of engaging the pin on either pawl, therebyholding it from engagement with the tooth portion, substantially as andfor the purposes stated.

WILLIAM H. GEORGE.

Witnesses:

Y J. W. BRYANT,

G. A. BROOKER.

